Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 13)

NOTE: Check that the chosen supply voltage follows the specification of the thermistor
element.
Summary
Input
Digital/analog Supply Voltage V
Cut-out Values Threshold
Cut-out Values
Digital 24 < 6.6kΩ — > 10.8kΩ
Digital 10 < 800kΩ — > 2.7kΩ
Analog 10 < 3.0kΩ — > 3.0kΩ
With the Torque limit feature the motor is protected from being overloaded independent
of the speed. With the ETR the motor is protected from being overheated and there is no
need for any further motor protection. That means when the motor is heated up the ETR
timer controls how long the motor can be operated at the high temperature before it is
stopped in order to prevent overheating. If the motor is overloaded without reaching the
temperature where the ETR turns off the motor, the torque limit will protect the motor
from being overloaded.
The ETR function is activated in 1-90 Motor Thermal Protection and is controlled in 4-16
Torque Limit Motor Mode. The time before the torque limit warning trips the drive is set in
14-25 Trip Delay at Torque Limit.
Product Description
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 11